Acoustic optical telegraph.



A. SANANDRBS. ACOUSTIC OPTICAL TELEGRAPH.

APPLICATION FILED MAY 1, 1911.

Pantea May "a, 1912.

Inventor:

./lzioma Sar/madres iior/zey UNITED STATES' PAriiiisi'rv OFFICE.

AN'roNIo sANANDREs, oF NEW YORK, N. Y.

l ACOUSTIC OPTICAL QDELEGRAPH.

To all 'whom i may concern:

Be it known that I, ANToNio SANANDiuis, a subject of the King of Italy,residing in New York, county and State of' New York, have inventedcertain new and useful Improvements in Acoustic Optical Telegraphs,

v the message transmitted in the usual doty and dash characters isdelivered in one o'r I more visual representations wherein the dots 8'fixed to the rear wall 9ct the case.'

and dashes are distinguishable from each other respectively not only bythe varying duration of such visual representation loutl also by thevarying character thereof.

To these ends my improvements comprise means described and claimed inthis speciication and illustrated in the accompanying drawings.

Figure 1 is a plan view with the case partly in section, of aninstrument einbodying the preferred form'of my improvements and Fig. 2is a similar sectional elevation of the same. Figs. 3 and 4 arediagrammatic plan views illustrating` the operation of my improveddevice.

The illustrated instrument comprises the usual coil magnet 3, 3 andarmature 4 for engagement therewith.4 Said armature is fixed to crossarm 7 pivoted at 5, 5 in uprights 6, 6, respectively and has itsrearwardly reaching arm 12'bearing uponstop A Spring 1() tending to'hold armature 4 out of contact with magnet 3, 3 is connected by r oneend to arm 7 and by the other end to base 11 on which said magnet isfixed. Upstanding from cross arm. 7 is bracket 21 having xed theretoreflector 22- visible through opening 23 in front 24 of. said case. Iemploy reflector 22 in preference to a nonreiiecting indicator-so that aray of light may be cast thereon from some convenient source. lnotshown, and thus increase the brilliance of the optical indication. Tabletop 25 of said case is provided wit-h a slot or perforation 13thyerethroug Directly below said table top 2.5l an `i dicator or pointer14 is mounted foi'l movement relative to said slot 18. Said indicator s,Specification of Letters Patent.

Application led May 1, 1911.

Patented May 7, 1912.

Serial No.V 624,298.

preferably of triangular shape 'and one ofits angles or points as 15, islocated directly below slot 13 or just rearwardly thereof, so that aslight forward movement, away from the magnet as' illustrated, willbring said point 15 into View, and a' greater movement thereof willbring awider portion of its face into view, the point corresponding withthe dot of' the Morse telegraphic characters and the wider portion witha dash thereof. Said indicator 14 is mounted for movement inapproximately the plane of table top 25,

by some suitable, means as thin springs, 16,`

16 fixed at their upper ends to the underside of said `indicator land attheir lower ends to base 17 ,of said case. Y Depending from armaturecross arm 7 is rod 18 the `lower end of which is guided for verticalmovement in foot 19 fixed to base 17. Below table top 25 andv fixed torod 18 is wedge 20 forl engagement with yieldable spring arin 26 fixedto indicator 14. p 4

The operation of my improved instrument is as follows t--Magnet 3, 3having been energized by an electric current from a sending instrumentin the usual well known manner, armature 4 fixed to the free end ofcross arm 7 is drawn down into contact with said magnet thereby makingthe usual contact sound and reiiector 22 moves down- 'wardly andslightly forwardly behind opening 23 and which movement is clearlyvisible through said opening. The duration of contact of said armatureand magnet and the duration of said refiectors remaining in its downwardposition `indicate audibly and visually respectively, whether a'dot ordash is'traiismitted. At the same time, rod 18 .and wedge 20 are moveddownwardly and said wedge engages arm 26 of indicator 14 thereby movingsaid indicator forwardly under and into viewthrough slot 13, one or bothedges of which slot serve as a gage against which to read the movementof said indicator. If said wedge 20 remains inl its downward positiononly an instant, F ig. 3, theinert-ia of indicator 14 will be only pai'-tially overcome and spring arm 26 will yield toward said indicator. Theforward movement of said indicator will therefore be slight and a dotwill be indicated. On the other hand if said wedge 20 remains in itsdownward position a longer time the inertia of indicator 14; will bemore fully overcome by the recoil of spring arm26 and said indi- Gatorwill be moved forwardly a greater diS- tance, Fig. 4, thereby exposing abroader portion through slot '13, indicating a dash.

.The circuit then'being broken the parts return to their idle positionsas shown in Fi s. 1 and 2. If spring arm 26 is relatively rigid, lrighthand spring' 16, Fig. 2, will tend to collapse under the initialdownward movementiof wedge 20, thus indicating a dot. It

` wedge is held down for a longer period downward position.

I claim 1. A telegraph instrument including in combination, a magnet, anarmature mounted for movement toward and from said magnet, a gage, anindicator having a face increasing in width as it recedes from said gageand means for moving said indicator from said armature to expose anarrow portion thereof for a dot impulse and a wid'er portion for a dashimpulse.

2. A telegraph, instrument including in combination, a magnet, anarmature mountcd for movement toward and from said magnet, a tablehaving a slot therein, an indicator below said table and mounted formovement into and out of view through said slot and means for movingsaid indicator from said armature, distano varying with the duration ofcontactof said armature and magnet.

3. A telegraph instrument including in combination, a magnet, anarmature pivotally mounted for movement toward' and from said magnet, areflector fixed to said armature, a gage, an indicator mounted formovement relative to said gageand means Jr rfor moving said indicatorfrom' said armaief distances varying-with the duration of contactof-said armature and magnet.

, 4.`A rtelegraph instrument including in combination, a magnet, anarmature pivotally mounted for movement toward and from said magnet, areflector fixed to said armature, a table having a slot therein, a

tapered indicator below said table and4 l mounted for movement into andout of view through said slot and means for moving said indicator fromsaid armature to Vexpose a narrow portionv thereof for a dotimpulse anda wider portion for a dash impulse.

5. A telegraph instrument including in combination, a magnet, anarmature mounted for movement toward and from said magnet, a gage, anindicator mounted for contact of said armature and magnet.

6. A telegraph instrumentincluding in combination, a magnet, an armaturemounted for movement toward and from said magnet, a gage, an indicatormounted for movement relative to said gage, a yieldable arm fixed tosaid Vindicator and means for moving said indicator through said armfrom said armature.

7. A telegraph instrument including' in combination, a magnet, anarmature mounted tor movement toward and from said magnet, a tablehaving a slot therein, an indicator below said table and mounted formovement into and out of view through said slot, a yieldable arm fixedto said indicator and means for moving said arm from said armature totransmit movement tosaid indicator varied in distance by the duration ofcontact of said armature and magnet.

Signed at New York, N. Y. this 29th day of April 1911 before twosubscribing witnesses. t ANTONIO SANANDRES Witnessese-TIL n CHA's. W. LARUE, LoUis B. TISCHLER.

